Transponders can be dropped off at one of our customer service centers: -20101 Hamilton Av, Ste 100A Torrance, CA 90502 -3501 Santa Anita Av El Monte, CA 91731 Or The mailing address for transponder return is P.O. Box 3339 Gardena, CA 90247 and yes, you pay for the postage.
No u can return at tha metro station in el monte.
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